<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8" />
<title></title>
<meta name="Keywords" content="" /> 
<meta name="Description" content="" />
<link type="text/css" rel="stylesheet" href="/css/public.css" />
</head>
<!--默认为 page_mid_default ，收缩为 page_mid_pull -->
<body class="page_mid_default" id="page_mid">
	<span class="middle_lin" id="lin"></span>
<script type="text/javascript">
function $(obj){
	return document.getElementById(obj);
}
function chkl(){
	var dom_body = $("page_mid"),
		classname = dom_body.className;
	if(classname == "page_mid_default"){
		dom_body.className = "page_mid_pull";
		window.parent.document.getElementById("frame").cols = "0%,12,*";
	}
	else if(classname == "page_mid_pull"){
		dom_body.className = "page_mid_default";
		window.parent.document.getElementById("frame").cols = "171,12,*";
	} 
}
$("lin").onclick = function(){
	chkl();
}
</script>
</body>
</html>